Answer: The correct answer is -
C. Sugar and oxygen.
Step-by-step explanation:
Photosynthesis is a process of formation of food (carbohydrate) in green plants and algae using inorganic molecules that are carbon dioxide and water in the presence of energy from sunlight.
It occurs in specialized membrane bound organelles, called chloroplast.
In this process, oxygen is released as waste product in the surrounding and sugar (food) produced is utilised as chemical energy by the organism.
Thus, option C) is the right answer.